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Glossary
SPID (Service Profile IDentifier) An alphanumeric string that uniquely identifies the service capabilities of an ISDN terminal. This is an identifier that points to a particular location in the Telco's central office switch memory where relevant details about the device are stored. Each BRI connection can have up to two SPIDs, one for each B channel.
SS7 (signalling System 7) This is a common channel signalling system used to establish ISDN call functions.
SVC (Switched Virtual Circuit) Used in packet data networking technology. Temporary virtual circuit between two users.
Switch Type The type of equipment that the telephone company uses to provide you with ISDN service.
Synchronous Data Link Control (SDLC) A discipline conforming to subsets of the Advanced Data Communications Control Procedures (ADCCP) of the American National Standards Institute (ANSI) and
Used for managing synchronous
Contrast with binary synchronous communication.
Synchronous transmission A data transmission scheme where the interval between transmitted characters is fixed so that start and stop bits are not required. In contrast with asynchronous transmissions, synchronous transmissions are guaranteed a specific percentage of bandwidth on the network medium.
TCP/IP (Transmission Control Protocol/Internet Protocol) Protocol for internetwork routing and reliable message delivery. TCP/IP functions at the 3rd and 4th layers of the Open Systems Interconnection model.
IP is the low level protocol for the TCP/IP protocol set. IP provides packet delivery services between nodes. On the same level as IP are ARP and RARP.
TCP is a reliable
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